[Captivate Q&A, Help & Troubleshooting] smithisize:
Well I follow the new instructions here: http://forum.cyanogenmod.com/topic/15513-all-models-cyanogenmod-7-developer-thread/

And run into the following (lots of problems fetching things):

From git://github.com/CyanogenMod/android_frameworks_base
eae76b9..bf17157 gingerbread -> github/gingerbread
Fetching projects: 52% (121/231) Receiving objects: 96% (13034/13460), 4.05 Mfatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/external/oprofile
fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/external/proguard
remote: Counting objects: 393, done.
remote: Counting objects: 55, done.
remote: Counting objects: 73, done.
remote: Compressing objects: 100% (46/46), done.
remote: Compressing objects: 100% (61/61), done.
remote: Compressing objects: 100% (319/319), done.
remote: Total 13460 (delta 9435), reused 13015 (delta 9044)
Fetching projects: 56% (130/231) Receiving objects: 20% (80/393), 36.00 KiB |fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/external/oauth
Fetching projects: 57% (132/231) Receiving objects: 99% (13372/13460), 4.61 MReceiving objects: 100% (13460/13460), 4.63 MiB | 120 KiB/s, done.
Resolving deltas: 100% (9435/9435), done. KiB | 70 KiB/s 5221/9435)
From git://github.com/CyanogenMod/android_build 83 KiB/s
* [new branch] donut -> github/donut
* [new branch] eclair -> github/eclair
* [new branch] froyo -> github/froyo
* [new branch] froyo-stable -> github/froyo-stable
* [new branch] gingerbread -> github/gingerbread
fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/external/easymock
fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/external/dnsmasq
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_external_wireless-tools
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_external_lsof
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_external_webkit
Fetching projects: 60% (139/231) fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/external/genext2fs
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_external_wpa_supplicant_6
remote: Total 55 (delta 10), reused 0 (delta 0)
Unpacking objects: 100% (55/55), done.
From git://github.com/teamhacksung/gingerbread-vibrant-initramfs
* [new branch] gingerbread -> github/gingerbread
Fetching projects: 63% (146/231) Receiving objects: 30% (118/393), 900.00 KiBfatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_external_wpa_supplicant
Fetching projects: 66% (153/231) Receiving objects: 30% (120/393), 1.42 MiB |Fetching projects: 67% (155/231) Receiving objects: 31% (122/393), 1.63 MiB |fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_hardware_libhardware
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_external_rsync
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_external_v8
Fetching projects: 68% (158/231) fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_packages_apps_AndroidTerm
fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/packages/apps/AccountsAndSyncSettings
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_packages_apps_ADWLauncher
Fetching projects: 70% (162/231) Receiving objects: 78% (307/393), 2.51 MiB |fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/external/qemu
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_hardware_alsa_sound
fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/packages/apps/Gallery
remote: Counting objects: 53, done.
remote: Total 73 (delta 23), reused 0 (delta 0)
Unpacking objects: 100% (73/73), done.
From git://github.com/teamhacksung/gingerbread-captivate-initramfs
* [new branch] master -> github/master
remote: Compressing objects: 100% (11/11), done.
remote: Total 46 (delta 38), reused 43 (delta 35)
Unpacking objects: 100% (46/46), done.
From git://github.com/tmobile/themes-platform-vendor-tmobile-themes-Androidian
70277ed..7f5e2bb master -> themes/master
Fetching projects: 76% (176/231) Receiving objects: 98% (386/393), 4.22 MiB |fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_packages_apps_GanOptimizer
Fetching projects: 77% (178/231) Receiving objects: 99% (390/393), 4.61 MiB |remote: Total 393 (delta 186), reused 114 (delta 26)
Fetching projects: 78% (181/231) fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_packages_inputmethods_LatinIME
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_packages_apps_DSPManager
Receiving objects: 100% (393/393), 4.93 MiB | 199 KiB/s, done.
Resolving deltas: 100% (186/186), done.
From git://github.com/teamhacksung/gingerbread-galaxys-initramfs
* [new branch] 2-6-25 -> github/2-6-25
* [new branch] 2.6.35 -> github/2.6.35
* [new branch] master -> github/master
Fetching projects: 79% (183/231) fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_packages_providers_DownloadProvider
fatal: Unable to look up github.com (port 9418) (Name or service not known)
error: Cannot fetch CyanogenMod/android_packages_apps_Phone
fatal: Unable to look up android.git.kernel.org (port 9418) (Name or service not known)
error: Cannot fetch platform/packages/providers/GoogleContactsProvider
remote: Counting objects: 12, done.
remote: Compressing objects: 100% (7/7), done.
remote: Total 7 (delta 5), reused 0 (delta 0)
Unpacking objects: 100% (7/7), done.
From git://github.com/tmobile/themes-platform-vendor-tmobile-themes-Cyanbread
4ef8536..fa570f9 master -> themes/master
remote: Total 31 (delta 18), reused 0 (delta 0)
Unpacking objects: 100% (31/31), done.
From git://github.com/teamhacksung/android_device_samsung_captivate
+ b594256...10655de gingerbread -> github/gingerbread (forced update)
remote: Counting objects: 220, done.
remote: Compressing objects: 100% (81/81), done.
remote: Total 124 (delta 55), reused 72 (delta 17)
Receiving objects: 100% (124/124), 18.36 KiB, done.
Resolving deltas: 100% (55/55), completed with 50 local objects.
From git://android.git.kernel.org/platform/sdk
706c0c0..a43666c master -> korg/master
remote: Counting objects: 1637027, done.
remote: Compressing objects: 100% (278423/278423), done.